> Hi,> > I am working on a USB mass storage driver for a pen drive. I have done> coding as per the USB_skeleton.c file provided in Linux 3.2 source> code. I could assign the driver to pen drive when pen driver is> inserted in USB connector.

Do you understand that the usb_skeleton.c file is totally inappropriate as a model for a mass-storage driver?

> 2. Is there any sample code(apart from Linux source) which describes> the SCSI transparent command set and mass storage driver?

There is no such thing as the SCSI transparent command set. "SCSI transparent" means "use whatever command set the relevant SCSI standard specifies".

There is non-Linux source code for mass-storage drivers in otheropen-source operating systems.

> 3. When I connect the pen drive and associate my driver, pop up> doesn't appear on the screen for this device. but when default> driver(usb_storage) is used this pop up does appear. What I need to do> here?

Fix your driver. It's not possible to give a more complete answer without further information.